linux-kernel - [tip: irq/core] bcma: gpio: Use generic_handle_irq

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Date:   Mon, 19 Sep 2022 13:25:47 -0000
From:   "tip-bot2 for Sebastian Andrzej Siewior" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org, maz@...nel.org
Subject: [tip: irq/core] bcma: gpio: Use generic_handle_irq_safe()

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     94ec234a16cf3acdb319f05917b1efec9642222e
Gitweb:        https://git.kernel.org/tip/94ec234a16cf3acdb319f05917b1efec9642222e
Author:        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
AuthorDate:    Mon, 19 Sep 2022 14:46:16 +02:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Mon, 19 Sep 2022 15:08:39 +02:00

bcma: gpio: Use generic_handle_irq_safe()

On PREEMPT_RT enabled kernels the demultiplex interrupt handler is force
threaded and runs with interrupts enabled. The invocation of
generic_handle_irq() with interrupts enabled triggers a lockdep warning due
to a non-irq safe lock acquisition.

Instead of disabling interrupts on the driver level, use
generic_handle_domain_irq_safe().

[ tglx: Split out from combo patch ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/YnkfWFzvusFFktSt@linutronix.de
---
 drivers/bcma/driver_gpio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bcma/driver_gpio.c b/drivers/bcma/driver_gpio.c
index fac8ff9..65fb9ba 100644
--- a/drivers/bcma/driver_gpio.c
+++ b/drivers/bcma/driver_gpio.c
@@ -115,7 +115,7 @@ static irqreturn_t bcma_gpio_irq_handler(int irq, void *dev_id)
 		return IRQ_NONE;
 
 	for_each_set_bit(gpio, &irqs, gc->ngpio)
-		generic_handle_irq(irq_find_mapping(gc->irq.domain, gpio));
+		generic_handle_domain_irq_safe(gc->irq.domain, gpio);
 	bcma_chipco_gpio_polarity(cc, irqs, val & irqs);
 
 	return IRQ_HANDLED;